TFlan:
Here's the info from the PC page, they use a 208 gram weight:
Parameters: Shafts checked on a golf shaft analyzer with a 5" butt
clamp, 70 >>lbs. of clamping pressure, a 208 gram weight at the
tip. All shafts (woods and >>irons) are checked utilizing this
method at full length.
john
There's no answer to your questions that make sense. PC publishes frequency
ranges they translate to letters (or vice versa). For example, the frequency
range for the Mach 22 R flexes are 307 - 316 cpm. They break it down further
to R-, R, and R+. R- shafts are in the low 4cpms of the range, R's in the
middle of the range, and R+ in the high 4 cpms. As you may be aware, there
is no "industry standard" for flex, torque, weights, or any other meaningful
aspect of golf shaft manufacture. Give that, there's no absolute way to
compare PC's numbers to say, Harrison's or Penley's or Golfsmith's numbers.
It simply does not exist. I believe PC uses a 200 gram tip weight (I know
that's what they used to use) to get the freqs. Further, beam lengths are
35" for irons, 40" for woods. And they use the same tip weight for both. So,
if they're getting 310 cpms at 35" with a 200 gm tip weight, or even with a
208 gr weight, that implies a pretty soft flex shaft. A typical 5 I head
weighs about 254 g so the finished club would appear to be considerably
softer flex than the published freqs would imply.
As for your question about a "typical finished 5-iron frequency," again, it
doesn't exist. Head weight, shaft length, shaft weight, shaft manufacturer
etc., are all different. I think most of us who've been around the biz for a
while have developed our own definitions of flex based upon frequency. I use
a freq of 300 cpm for a 38" 5 iron, with a 254 gram tip weight attached, as
an "R" flex, but that varies with the shaft composition so it isn't an
absolute. However, for my own charts, 300 cpm works for me. Others may use
different numbers.
Sorry to be non-committal but as I said, there ain't no standards.
TFlan
----- Original Message -----
From: "Barry, Don" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, March 20, 2003 9:07 AM
Subject: ShopTalk: Mach 22 freq specs
Could one of you erudite gentlemen with a frequency meter help me to make
sense of the published specs on this shaft? The Precision Composites
website lists the frequency range of the Mach 22 shafts with a 5" butt
clamp, 70 lbs. of clamping pressure and a 208 gram weight at the tip.
Can someone clue me in as to how this might translate to the numbers
published in Golfsmith's 2002 OEM shaft replacement guide?
http://www.golfsmith.com/cm/pdf/2002_oem_replacement.pdf
Specifically, how does the published raw frequency of an iron shaft
compare
> to a typical finished 5-iron frequency?
>
> Thanks,
> Don Barry
--
Thanks!
John Muir
http://clubmaker-online.com
http://gripscience.com
http://tourpure.com
810.220.4918
